TV Guide Alibi Sunday

DI Humphrey Goodman and fiancee Martha Lloyd settle in Devon, where she runs a restaurant, while he joins the local police. Humphrey and Esther join the Shipton Abbott Players for a murder mystery rehearsal. Though Humphrey is only playing a detective, things turn from amateur to professional when the actor playing the victim is found dead with a real knife in his back. As the duo tackle the perplexing crime, they soon unravel a dark past that reveals hidden connections between the actors. Away from the case, Humphrey and Martha embark on the process of becoming foster parents, while Anne catapults herself into the world of online dating. Detective drama, starring Kris Marshall, Sally Bretton and Zahra Ahmadi

A clairvoyant predicts unusual events that begin occurring in the life of a recently bereaved woman. The team starts to suspect that the psychic's powers might be too good to be true, as the woman starts ending up in more and more dangerous situations. When the officers discover a connection to her deceased grandfather, everything begins to fall into place. On the home front, it's a big day for Humphrey and Martha as they attend their fostering interviews. The pair are intent on demonstrating how earnest they are to proceed. Detective drama, starring Kris Marshall, Sally Bretton, Zahra Ahmadi and Peter Davison

A group of astronomers gathers on the cliffs of Saint Marie to watch Jupiter and Saturn align - a once-in-a-lifetime planetary event. However, one of its number - renowned professor Bertrand Sworder - meets an untimely death. The circumstances of his demise warrant the involvement of Neville and Naomi, who soon learn there was some professional hostility towards Sworder. Back at the station, Darlene announces that she has passed her exam and is ready to be a trainee officer. Caribbean-set detective drama, starring Ralf Little, Don Warrington and Tahj Miles

The team investigates a survivalist commune when one of its members is poisoned inside a locked bunker. However, with CCTV footage showing that no one went in or came out while he was in there, it seems likely that he has taken his own life - or has he? Meanwhile, Neville has a series of adventurous dates with Sophie. Robert Webb guest stars

The clerical sleuth discovers that a murderer is using Kembleford's new model village to plan their attacks. Mark Williams stars, with Claudie Blakley and Aidan McArdle in this mystery drama based on the stories by GK Chesterton.

An anonymous message invites Frank to join a two-day Shakespearian walk, advising him a crime will be committed. Kitted up, Frank joins the other revellers. However, the idyllic event soon turns to disaster when one of the walkers is murdered and Frank becomes the prime suspect. Lu and Sebastian set about cracking the case in a bid to prove Frank's innocence. Mark Benton, Jo Joyner and Patrick Walshe McBride star